Greetings!
Students learn best when the instructor employs a variety of methods for engagement. If the instructor has the opportunity to employ both the synchronistic and asynchronistic formats, she will be able to reach a lot of students and appeal to their different styles of learning. I have had the opportunity to use both in my classroom, and I appreciate the chance to engage with students through powerpoints and live discussions. I also realize that this style of teaching does not appeal to the more independent student, and I enjoy actively engaging on the discussion board and posting additional materials for the student to enjoy.